On Tue, Jan 12, 2021 at 9:05 AM Alexander Potapenko <glider@xxxxxxxxxx> wrote: > > On Tue, Jan 5, 2021 at 7:28 PM Andrey Konovalov <andreyknvl@xxxxxxxxxx> wrote: > > > > Add 3 new tests for tag-based KASAN modes: > > > > 1. Check that match-all pointer tag is not assigned randomly. > > 2. Check that 0xff works as a match-all pointer tag. > > 3. Check that there are no match-all memory tags. > > > > Note, that test #3 causes a significant number (255) of KASAN reports > > to be printed during execution for the SW_TAGS mode. > > > > Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx> > > Link: https://linux-review.googlesource.com/id/I78f1375efafa162b37f3abcb2c5bc2f3955dfd8e > > --- > > lib/test_kasan.c | 93 ++++++++++++++++++++++++++++++++++++++++++++++++ > > mm/kasan/kasan.h | 6 ++++ > > 2 files changed, 99 insertions(+) > > > > diff --git a/lib/test_kasan.c b/lib/test_kasan.c > > index 46e578c8e842..f1eda0bcc780 100644 > > --- a/lib/test_kasan.c > > +++ b/lib/test_kasan.c > > @@ -13,6 +13,7 @@ > > #include <linux/mman.h> > > #include <linux/module.h> > > #include <linux/printk.h> > > +#include <linux/random.h> > > #include <linux/slab.h> > > #include <linux/string.h> > > #include <linux/uaccess.h> > > @@ -790,6 +791,95 @@ static void vmalloc_oob(struct kunit *test) > > vfree(area); > > } > > > > +/* > > + * Check that match-all pointer tag is not assigned randomly for > > + * tag-based modes. > > + */ > > +static void match_all_not_assigned(struct kunit *test) > > +{ > > Do we want to run this test in non-tag-based modes? Probably not? Will fix in v2, thanks!
